/*
 * Copyright 2020-2099 sa-token.cc
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package cn.dev33.satoken.context.dubbo3.filter;

import cn.dev33.satoken.SaManager;
import cn.dev33.satoken.context.SaHolder;
import cn.dev33.satoken.context.SaTokenContextDefaultImpl;
import cn.dev33.satoken.same.SaSameUtil;
import cn.dev33.satoken.stp.StpUtil;
import cn.dev33.satoken.util.SaTokenConsts;
import org.apache.dubbo.common.constants.CommonConstants;
import org.apache.dubbo.common.extension.Activate;
import org.apache.dubbo.rpc.*;

/**
 * Sa-Token 整合 Dubbo3 Consumer 端（调用端）过滤器
 *
 * @author click33
 * @since 1.34.0
 */
@Activate(group = {CommonConstants.CONSUMER}, order = SaTokenConsts.RPC_PERMISSION_FILTER_ORDER)
public class SaTokenDubbo3ConsumerFilter implements Filter {

    @Override
    public Result invoke(Invoker<?> invoker, Invocation invocation) {

        // 追加 Same-Token 参数
        if(SaManager.getConfig().getCheckSameToken()) {
            RpcContext.getServiceContext().setAttachment(SaSameUtil.SAME_TOKEN,SaSameUtil.getToken());
        }

        // 无上下文直接跳过下面流程
        if (!SaHolder.getContext().isValid()) {
            return invoker.invoke(invocation);
        }

        // 1. 调用前，向下传递会话Token
        if(SaManager.getSaTokenContext() != SaTokenContextDefaultImpl.defaultContext) {
            RpcContext.getServiceContext().setAttachment(SaTokenConsts.JUST_CREATED, StpUtil.getTokenValueNotCut());
        }

        // 2. 开始调用
        Result invoke = invoker.invoke(invocation);

        // 3. 调用后，解析回传的Token值
        StpUtil.setTokenValue(invoke.getAttachment(SaTokenConsts.JUST_CREATED_NOT_PREFIX));

        // note
        return invoke;
    }

}
